What about Setun, a soviet ternary computer like in

[1] https://en.wikipedia.org/wiki/Setun

[2] https://web.archive.org/web/20080207064711/http://sovietcomp...

[3] http://www.computer-museum.ru/english/setun.htm

It is a stack machine, it has somthing like FORTH.

In which you can implement anything else, if you absolutely have to. Like some have done with another stack oriented system here:

[4] https://en.wikipedia.org/wiki/POP-11

[5] https://en.wikipedia.org/wiki/Poplog

[6] http://www.cs.bham.ac.uk/research/projects/poplog/freepoplog...

And then have some cybernetic monks preach the advantages of something like TRON

[7] https://en.wikipedia.org/wiki/TRON_project

applied to all of the above.